A theme park management tycoon game with an aquatic twist. Design your displays, look after your fish, manage your staff and keep your guests happy! It's all in a day's work as the curator of your very own Megaquarium.
Recent Reviews:
Very Positive (68) - 94% of the 68 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (334) - 89% of the 334 user reviews for this game are positive.
Release Date:
Sep 13, 2018

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Recent updates View all (13)

October 23

Patch v1.1.5

Hey guys, I've been super busy with a house move over the last week but I've still managed to squeeze out a little patch for you!

- Added staff priorities to level up messages.
- Added fully grown active swimmer requirement to tooltip.
- Fixed bug where cashflow was misreporting the costs of food, drink and gift shop items.
- Fixed bug where guide book and balloon refills were too cheap.
- Fixed bug where calcium reactor was free.
- Reduced number of horse eye jacks given as gift in Myra level from 5 to 3.
- Fixed bug with deep outcrop tank where staff would go inside temporarily if you dropped it on top of them.
- Fixed bug where Blue Whiting had no ecology point value.
- At end of day we don't auto drop items that are being carried by the player unless they are tanks or animals.
- Scenery no longer produce negative prestige if a guest sees it over and over.
- Clicking cancel task now drops the item making it slightly easier to force staff to do a particular job. (More stuff coming in this area!)
- Fixed bug where staff learned slightly slower on fast mode.

I'm still very busy with the house move but after I've moved I'll be back with more update goodness! :steamhappy:
16 comments Read more

October 12

Patch v1.1.4

Hey guys, big update for you today. There really is something for everybody in this one!

Upgraded message log
a) Important message toggle - filters out unimportant messages like autopsy and growth reports after they have been read. Also trades, merchants and missions that have already been completed.
b) Delete message functionality with the option to "delete all" of the same type e.g. autopsy and growth messages.

Staff level ups
Staff level ups are now just messages which sit in your log until you are ready for them. This was a highly requested feature from players who found the constant interruptions annoying.

The good news is that staff continue to accrue skill points even when they are ready to level up. Therefore there is no penalty if you delay levelling up while you are busy with something else!

Staff cap increased
I have added 14 brand new staff to the game. That is a 50% increase on the existing staff cap.

I have made this change in reaction to requests from players whose aquariums were being constrained by the old staff cap, especially in sandbox mode. This boost should help a lot!

If you already have a large sandbox aquarium you should be able to load it up and you'll immediately gain access to new staff!

I am not ruling out additional increases to the staff cap in the future but I want to change things gradually, to avoid breaking the game.

One thing I'm keen on, is staff not feeling like mindless drones like you get in RTS games. I want to keep the total number low enough that the player is familiar with their staff and can manage them effectively.

To that end, the next area I want to focus my attention on is improving the productivity of each staff member via additional control settings, improved zoning, a better staff manage tab and by tweaking certain mechanics.

My hope is that by improving overall staff productivity we can allow for huge aquariums but without resorting to the blunt instrument of hundreds of unmanaged staff, which I believe would reduce the overall fun of the game.

Other changes
- Massively increased performance of the simulation when running on fast speed setting.
- Build menu now remembers its place if you return to the same menu as last time.
- Min and max volume of tanks is now shown in the build menu.
- Fixed bug where hats and hair appear to lift off guest and staff heads on low and medium detail graphical settings.
- Fixed bug where guest animations would stop when too close in first person mode.
- Added two new hair colours for guests and staff!
- Slightly reduced point bonus when giving talks with a very high talking skill.
- Added missing food boxes to Hartcliff, Myra and Carbon City levels.
- Calcium Reactor no longer gives Prestige points (whoops!) and will stop providing coral growth benefit if broken down for too long.
- Corrected coral growth bonus provided by Calcium Reactor. The bonus was being incorrectly inflated before.
- Slightly increased staff salaries.
- Renamed Other Inverts to "Anemones, Clams and Gorgonians". There were two sections named "Other Inverts" before.
- Added missing string to end of level 10.
- Fixed issue where daily sales objectives were blank in French language.
- Sandbox mode always starts with at least one "cleaner"
- Large tunnel and Kreisel tanks are now paintable.
- You can now paint underneath Belfast and Kreisel tanks.
- Fixed various Kreisel tank issues: off-centre task bubbles, could not build across back wall.
- Fixed bug where certain walls on Deep Outcrop and Large Tunnel Tank could not be built across.
- Fixed bug where info box on message would escape its message window when you scroll.
- Tweaked words on level 3 to point player to message log for two of the corals.

Enjoy! :steamhappy:
27 comments Read more


“A charming watery theme park management game where fish are friends, not food. Until they eat each other or you forget to feed them.”
86 – PC Gamer

“Megaquarium is an fantastic tycoon title with a surprising amount of depth.”
85 – GamingTrend

“As a tycoon game, Megaquarium strikes a very nice balance between having too much complexity vs. not having enough depth to remain entertaining.”
80 – Gaming Nexus

Release is just the beginning

(A note from the developer)

Thank you to everyone for the amazing response since the game has released. This note is to let players know what my plans are in the coming weeks.

Since launch I've been working flat out on bug fixes, optimisation and user interface improvements in reaction to feedback from players. Right now I'm working on a substantial update to allow additional options for managing your staff which I'm looking forward to sharing with you.

After I'm finished with this there are a couple of fundamental features that still need to be implemented. These are:

  • Cloud save
  • Steam workshop/mod support

After that is when things start to get really interesting, with the potential for new content and ways to play the game. I'll be deciding what's next based on your feedback so be sure to let me know what you'd love to see in the game!


(Developer, Twice Circled)

About This Game

From the creator of Big Pharma comes a brand new economic simulation game. Megaquarium follows in the footsteps of classic theme park management tycoon games and adds an aquatic spin!

A living simulation

Starting with just a few tanks and the most basic of livestock, you’ll grow your aquarium to a thronging metropolis filled with hundreds of guests, tens of staff and a multitude of different aquatic lifeforms, each with their own unique care requirements.

Design your exhibits

Megaquarium features almost 100 different marine species including fish, sharks, crustaceans, corals, jellyfish, other invertebrates and even a turtle! You’ll be spoilt for choice as you design, decorate and populate your tanks.

The right staff for the job

You won’t get far without the right staff. Choose who to hire based on their skills and future potential. Will you train up a team of multi-disciplined staff or a set of super-focussed experts? You’ll have to weigh up the pros and cons of each strategy and work out what is right for your aquarium.

Research new animals and technology

As guests experience your displays you’ll earn points which you can assign to discovering new livestock and equipment. Keep upgrading and expanding your aquarium and work your way up to the most prestigious animals and displays in the aquarium industry.

Manage your finances

The latest fish might look cool, but have you considered its impact on your aquarium’s bottom line. Tricky animals may require new staff to be hired, expensive fish food or supplements and the best tanks are a hefty investment! As aquarium curator you’ll need to master creativity and economics to succeed.

Manage your guests!

Keep your guests happy by providing them with seating, food, drinks and toilet facilities. Then at the end of their visit, direct them through the gift shop to boost your profits!

Curator school

Start your career in the campaign mode where you’ll learn everything you need to know about designing and managing an aquarium. Each of the 10 levels challenges you to build an aquarium with unique gameplay conditions and objectives, while new features and concepts are explained along the way.

Dive into the sandbox

Next explore sandbox mode where, with customisable settings and a random challenge generator, you can find virtually unlimited fish-related gameplay!

Easy to learn, difficult to master

Running an inefficient aquarium is easy. To really thrive and take on the greatest challenges you’ll need a lateral thinking brain and attention to detail. Will you group your animals by food type, water quality or something else entirely? Will you locate your equipment in a centralised hub using pumps or spread them out embracing the zoning system? How will you optimise your layout so that visitors can find your tanks and staff can easily access them?

Every decision you make in Megaquarium has consequences. Your choice of animals, filters, tanks, staff and layout all have subtle and far reaching effects on each other. Experiment, adjust, learn, reapply and most importantly, have fun!


  • 10 level ‘learn the game’ campaign
  • Sandbox mode with full customisation and random challenge generator
  • 97 species of livestock to discover each with their own unique care requirements
  • Over 100 different objects to place including filters, skimmers, nitrate reactors, chillers, heaters, food boxes, equipment stations, doors, gates, food and drink dispensers, balloon stands, decorations, paint and more!
  • Plan staff talks down to the subject, time and frequency to increase your point income even further!
  • Gift shop and guest facilities
  • Fully featured theming and decoration system

System Requirements

Mac OS X
SteamOS + Linux
    • Requires a 64-bit processor and operating system
    • OS: Windows 7 64 bit
    • Processor: Intel Core i5-4690 or AMD Ryzen 7 2700U
    • Memory: 8 GB RAM
    • Graphics: GeForce GTX 560 or AMD Radeon HD 7770
    • Storage: 1 GB available space
    • Requires a 64-bit processor and operating system
    • Requires a 64-bit processor and operating system
    • OS: OSX 10.10 or higher (64bit)
    • Processor: 2x 6-Core Intel Xeon 2.66 GHz (Mac book pro circa 2016)
    • Memory: 8 GB RAM
    • Graphics: AMD Radeon HD 7950
    • Storage: 1 GB available space
    • Requires a 64-bit processor and operating system
    • Requires a 64-bit processor and operating system
    • OS: 64bit operating system
    • Processor: Intel Core i5-4690 or AMD Ryzen 7 2700U
    • Memory: 8 GB RAM
    • Graphics: GeForce GTX 560 or AMD Radeon HD 7770
    • Storage: 1 GB available space
    • Requires a 64-bit processor and operating system

What Curators Say

31 Curators have reviewed this product. Click here to see them.
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